Dumping-grate.



E. v. GILBERT I G. HfKRAMER.

DUIVIFING GRATE.

APPLICATION FILED DEC. B. 1914.

E. V. GILBERT III s. H. KRAMER.

DUMPING GRATE.

APPLICATION FILED nic. 8. 1914.

Patented Nov. 21, 1916.

2 SHEETS-SHEET 2.

'UNITED STATES PATENT oErioE.

EARL V. GILBERT AND GEORGE H. KRAMER, OF DAYTON, OHIO, ASSIGNORS TO THE KRAMER BROTHERS FOUNDRY COMPANY, OF DAYTON, OHIO, A CORPORATION OF OHIO.

DUMPING-GRATE.

Specification 0f Letters Patent.

Patented Nov. 21, 1916.

T0 all whom t may concern: v

Be it known that we, EARL V. GILBERT and GEORGE H. KRAMER, both citizens of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Dumping-Grates, of which the following is a specification.

Our invention relates to grates for boilers, furnaces or similar purposes and particularly to a shaking or dumping grate and t0 the operating means therefor.

The object of the invention is to simplify the structure as well as the means and mode of operation of such devices whereby they will not only be cheapened in construction but will be more efficient in use, easily oper-- ated, and unlikely to getout of repair.

A further object of the yinvention is to provide an improved form of grate unit in which the fire will be supported above the truss bars or frame ofthe unit thereby reducing to minimum the tendency to warp the frame or support for the grids under the influence of intense heat.- A

A further object of the invention is to provide an improved form of mounting for the oscillatory grate unit which, while permitting the ready assembling of the parts, will prevent the accidental disengagement thereof during the shaking or dumping operation.

Further object of the invention is to provide improved means for oscillating the grate units in unison and for normally limiting such oscillation to a comparatively small degree of movement but permitting the degree of oscillation to be increased at will.

With the above primary and otherincidental objects in view, as will more fully appear in the specification, the' invention consists of the features of construction, the parts and combinations thereof,l and the mode of operation, o their equivalents,as hereinafter described and set forth in the claims.` -Y Referring to the drawings, Figure 1 is a perspective view of a grate setting showing one section in its normal position while the second section is in dumping position. Fig.

the grate units.

2 is a longitudinal sectional view through' one of the grate sections showing the grate Vthe bridge wall-3. Arranged transversely to the bearing bars 1 1, at their forward and rearward ends, are stationary grate bars 4. Each of these stationary grate bars comprises a main body from which project laterally a plurality of spaced short lingers or lugs These fingers or lugs 5 may project at right angles to the main body of the stationary bar, as shown in Fig. 1, or may be arranged at an inclination thereto agreeing with theinclination of the grids of the oscillatory grate units hereinafter described,`which lvariation is so obvious as not to require illustration. Y

The rails or supporting bars l are provided upon their upper edge at suitable intervals with arcuate notches or recesses 6 in which the trunnions of the oscillatory grate units hereinafter described are mounted..V vThese openings or recesses 6 are so located in the rails or bearing bars with relationv to the top edge of the bar that the opening into the recess is of less width than the diameter of the opening below the edge of the bar. That is, the edge of the bearing bar or rail intersects the openingv intermediate the center of the recess and its projected periphery. The trunnion 7 of the notch or recess G. This permits the trunnion to be inserted into the notch when turned to a position as shown in Fig. 4.. After the trunnion is seated inthe notch the oscillation of the grate unit to the posiions shown in Figs. 1 and Q will prevent the withdrawal of the trunnion from the recess or notch dueto the overhanging shoulders of the notch which conform to the arcuate periphery of the trunnion.

The oscillatory grate units each coriprise a main frame 8 substantially rectangular in shape and provided with medially disposed longitudinal and transverse truss bars 9 and 10 inclined from their centers outward whereby said truss bars will be of greater depth at their juncture in the center of the grate unit than at their juncture with the frame S at the edges of the unit. There is thus provided an excess of material at the center of the grate where it is subjected to intense heat and less material at the edges of the grate where the heat is less intense.

-By this means the variation in the intensity of the heat is compensated for by the distribution of the metal in the supporting frame of the grate unit.

Formed integral with the frame S and the truss bars 9 and 10 but projecting above the level thereof are a plurality of grids or grate bars arranged in spaced relation or separated one from the other and positioned in inclined or diagonal relation with the frame 8. It is to be noted that the frame extends only to the under side of these grids or grate bars and that the spaces intermediate the bars are open throughout their entire length except at the end of the oscillatory unit where terminal bars 12 are provided with which the adjacent diagonal bars 11 merge. The grids or grate bars 11 and 1:2 project slightly beyond the limits of the frame 8 and are preferably slightly beveled or prism shaped whereby their upper faces are slightly wider than their lower faces.

The location of the grids or bars 11 above the level of the frame 8 and their spaced relation one from the other permits a free and uninterrupted circulation of air intermediate the bars. This air space is slightly increased by the inclined or wedge shape of the bars. The grids of succeeding units are arranged to register one with the other7 as shown clearly in F ig. 1, and the grids or bars of the terminal grate units register with the studs or lingers 5 of the stationary bars 4. This construction provides continuous air spaces throughout the entire length of the grate.A The circulation of air intermediate the grate bars is not interrupted by the projection of the frame e nor by unregistered ends of the bars or grids ofthe succeeding units. Y

The terminal bars or grids 12 are located in spaced relation with the rails or supporting bars 1 from which they are separated by interposed shoulders 13 adjacent to the trunnions 7.

Projecting from the under side of the frame 8 and preferably formed integral therewith is a rock arm 1-1 by which the grate unit is oscillated. A reciprocatory bar 15 is pivotally engaged with the rock arm 14C ofV each of the grate units of the series. A pitman 16 connects the reciprocatory bar 15, or any one of the rock arms 14 connected to said bar, with an oscillatory operating lever 17 which is pivoted at 18 to a bracket arm 19 projecting from the frame 2. This arm 19 is provided with a recess 2O the sides of which are preferably undercut or beveled inward toward each other. Pivoted to the operating lever 17 is a detent arm 21 having thereon a beveled or divergent lug 2:2 which engages in the recess 20 in the arm 19. The

lug 22 is of less extent than the recess 2OA thereby permitting a limited reciprocatory movement of the lug within the recess upon the oscillation of the operating lever 17.`

The lug 22, by engaging with the sides of the recess 20, limits'the oscillatory movement of the lever 17 and thereby limits the degree of oscillation ofthe grate units, as

shown in Fig. 2. In this figure these grate units are shown in shaking position. The overhanging shoulders of the recess 2O prevent the accidental disengagement of the 'lug from the recess at Athe limit of its stroke. By the oscillation of the lever 17 throughout the degree of movement limited bythe engagement of the lug 22 with the sides of the recess 20, the grate units are oscillated in unison. first in one direction and then in the other, to free the grate from accumulation of ashes, cinders, etc. When it is desired to discharge the contents of the grate unit the detent arm 21 is lifted upward to lift the lug 22 out of the recess 2O thereby permitting the operating lever 17 an additional .movement, as shown at the right in Fig. 1, during which movement the `lug 22 will ride upon the upper' side of the bracket arm 19. This additional movement of the operating lever 17 causes a 'corresponding oscillatory movement of the grate unit, as shown in Fig. 1, to discharge the contents thereof.

Adjustably mounted upon the pitman 16 is a weight 23, the momentum of which, as the operating lever 17 is oscillated. completes the movement of the lever and the grate unit. The Weight 23 serves as a balance Weight7 the momentum of which accelerates the oscillatory movement of the grate units, causing them to approach the limit of their movement in either direction with considerable force whereby their ab rupt arrest, at the limit of their stroke, will elfectually ar or disturb the contents of the Orate units to discharge the refuse therefrom. The Weight 23 tends to increase the violence or intensity of movement of the grate unit during the shaking operation thereby increasing its efficiency.

Projecting from the top of the Weight 23 is a rib or bead 24 adapted to be engaged by an oscillatory detent 25 mounted upon the frame 2 and provided upon its under surface With two parallel beads or ribs 26. l/Vhen the grate units are in their normal position the rib 24, upon the Weight 23, is in position to be engaged intermediate the ribs 26 of the detent, upon the oscillatory movement of the latter, thereby locking the operating lever 17 and the grate units against movement. The rib 24 has been located upon the Weight 23 merely for convenience of manufacture and assembling. It is obvious that a projecting stud or pin carried upon the pitman 16 and engaged by the detent 25 may be used in lieu of the construction before described.

From the above description it Will be apparent that there is thus provided a device of the character described possessing the particular features of advantage before enumerated as desirable but which is obviyously susceptible of modification in its form,

proportion, detail construction or arrangement of parts, Without departing from the principle involved or sacrificing any of its advantages. u

l/Vhile in order to comply With the statute the invention has been described in 'language more or less specific as to certain structural features, it is to be understood that the invention is not limited to any specic details but that the means and construction herein described comprise but one mode of putting the invention into effect, and the invention is therefore claimed broadly in any of its possible forms or modifications Within the scope of the appended claims.

Having thus described our invention, We claim:

1. The combination with an oscillatory grate unit of an operating lever therefor, a detent carried by the lever, Xed stops spaced one from the other and alternately engaged by the detent permitting a limited movement of the lever in either direction of less extent than the full stroke of which said lever is capable, said detent being movable independent of the lever out of position to engage the stops, thereby permitting the lever an additional degree of movement.

2. The combination with an oscillatory grate of an operating lever therefor, an arm pivoted to the lever, a lug on said arm, a rest for the arm having therein a recess having inwardly projecting shoulders beneath which the said lug engages at the limit of its stroke in either direction, substantially as and for the purpose specified.

3. The combination With an oscillatory grate unit of an operating lever therefor, a bracket to Which the lever is pivoted said bracket having a recess therein provided with beveled shoulders, an arm pivoted to the operating lever and normally projecting into the recess in the bracket, the engaging portion of the arm being of less extent than the recess, permitting a limited movement of the arm therein, the opposite faces of the engaging portion being beveled to engage beneath the beveled shoulders of the recess adapted by its engagement with the sides of the recess to limit the movement of the lever, said arm being capable of disengagement from the recess by its oscillatory movement about its pivotal connection with the lever to permit the lever an'additional movement.

4. The combination With a series of rocking grate bars, of a reciprocatory actuating member operatively connected With the several grate bars, a lever connected With said actuating member, tvvo fixed stops arranged in spaced relation one With the other, a detent pivotally mounted on said lever, said detent being movable into and out of position intermediate thesaid fixed stops, said fixed stops being spaced apart to permit the lever to have limited movement and serving to positively limit the movement of said lever in either direction to a degree less than the full stroke of Which said lever is capable, said detent being movable to disengage the same from the stud to permit of a longer movement of said lever.

5. The combination with a series of grate bars, and a reciprocating actuating bar therefor, of a lever connected With said bar, a detent to lock said bar against all movement, a xed stop, a second detent connected With the lever and coperating With said stop to permit the said lever to have a limited movement when said first mentioned detent is in its inoperative position, said last detent being also movable into an inoperative position to permit the unlimited movement of said lever.

6. The combination With a rocking grate bar and a device to operate the same comprising a lever, of a detent pivotally mounted upon said lever, two fixed stops arranged to extend on opposite sides of the detent carried by said lever permitting a limited swinging movement of the lever.

7. In a grate, the combination With a rocking grate bar, of an operating device theretherein, a second detent pivotally mounted In testimony whereof, we have hereunto 13 on said lever and adapted to project within set our hands this 30th day of November the receSs in the Xed stop, the recess in the A. D. 1914.

lixed stop being proportioned to allow said EARL V GILBERT detent to have movement therein, whereby GEORGE H. KRAMER when the first mentioned detent has been disengaged from the operating device the Witnesses:

lest mentioned detent will limit the swinging JOHN S. CLARK, movement of the lever in both directions. HENRY F. NOLAN.

Copies of this patent may be obtained for five cents eaehtby addressing the Commissioner of Patents, Washington, D. C. 

